She asked me _______ I had returned the books to the library, and I admitted that I hadn't.
when
where
whether
what
Many people who live along the coast make a living _______ fishing industry.
at
in
on
by
If the new safety system _______ to use, the accident would never have happened.
had been put
were put
should be put
would be put
People______better access to health care than they used to,and they're living longer as result.
will have
have
had
had had
Jim has retired, but he still remember the happy time _______ with his students.
to spend
spend
spending
spent
The little problems ______ we meet in our daily lives may be inspirations for great inventions.
that
as